Basically the problem is to find the position of a submatrix inside a larger matrix. Here are some links describing the problem:
https://stackoverflow.com/questions/10529278/fastest-way-to-find-a-m-x-n-submatrix-in-m-x-n-matrix https://stackoverflow.com/questions/16750739/find-a-matrix-in-a-big-matrix Best Morgan On Fri, 11 Oct 2019 23:36 Gabor Grothendieck, <ggrothendi...@gmail.com> wrote: > The link you posted used the same inputs as in my example. If that is > not what you meant maybe > a different example is needed. > Regards. > > On Fri, Oct 11, 2019 at 2:39 PM Pages, Herve <hpa...@fredhutch.org> wrote: > > > > Has someone looked into the image processing area for this? That sounds > > a little bit too high-level for base R to me (and I would be surprised > > if any mainstream programming language had this kind of functionality > > built-in). > > > > H. > > > > On 10/11/19 03:44, Morgan Morgan wrote: > > > Hi All, > > > > > > I was looking for a function to find a small matrix inside a larger > matrix > > > in R similar to the one described in the following link: > > > > > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.mathworks.com_matlabcentral_answers_194708-2Dindex-2Da-2Dsmall-2Dmatrix-2Din-2Da-2Dlarger-2Dmatrix&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=v96tqHMO3CLNBS7KTmdshM371i6W_v8_2H5bdVy_KHo&s=9Eu0WySIEzrWuYXFhwhHETpZQzi6hHLd84DZsbZsXYY&e= > > > > > > I couldn't find anything. > > > > > > The above function can be seen as a "generalisation" of the "which" > > > function as well as the function described in the following post: > > > > > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__coolbutuseless.github.io_2018_04_03_finding-2Da-2Dlength-2Dn-2Dneedle-2Din-2Da-2Dhaystack_&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=v96tqHMO3CLNBS7KTmdshM371i6W_v8_2H5bdVy_KHo&s=qZ3SJ8t8zEDA-em4WT7gBmN66qvvCKKKXRJunoF6P3k&e= > > > > > > Would be possible to add such a function to base R? > > > > > > I am happy to work with someone from the R core team (if you wish) and > > > suggest an implementation in C. > > > > > > Thank you > > > Best regards, > > > Morgan > > > > > > [[alternative HTML version deleted]] > > > > > > ______________________________________________ > > > R-devel@r-project.org mailing list > > > > https://urldefense.proofpoint.com/v2/url?u=https-3A__stat.ethz.ch_mailman_listinfo_r-2Ddevel&d=DwICAg&c=eRAMFD45gAfqt84VtBcfhQ&r=BK7q3XeAvimeWdGbWY_wJYbW0WYiZvSXAJJKaaPhzWA&m=v96tqHMO3CLNBS7KTmdshM371i6W_v8_2H5bdVy_KHo&s=tyVSs9EYVBd_dmVm1LSC23GhUzbBv8ULvtsveo-COoU&e= > > > > > > > -- > > Hervé Pagès > > > > Program in Computational Biology > > Division of Public Health Sciences > > Fred Hutchinson Cancer Research Center > > 1100 Fairview Ave. N, M1-B514 > > P.O. Box 19024 > > Seattle, WA 98109-1024 > > > > E-mail: hpa...@fredhutch.org > > Phone: (206) 667-5791 > > Fax: (206) 667-1319 > > ______________________________________________ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > > > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel